Hollow walled carton



April 4, 1944. M. A. SMITH HOLLOW WALLED CARTON Filed Feb. 10, 1940 2 Sheets-Sheet l .w r 35 e A fm M. A. SMITH 2,345,716 HOLLOW WALLED CARTON Filed Feb. 10, 1940 2 Sheets-Sheet 2 eigyc lxhaa e is e HQLLQLWU W LED ILARTGN Miitoh A Smith, slicers, 753., assigncr to Chicago 6' all?) My; elhicsqgo, Kill, corporation c This invention relates to an improvement in fold and slit lines respectively designated F and S, hollow or tubular walled boxes, and, more portio so as to divide the blank into a bottom wall or ularly to boxes of that type which are capable of panel it! and wall forming sections I I, 52, I 3 and being folded to a flat or collapsed condition for M. Each of the wall forming sections includes storage and shipment purposes, and which may Eii'old lines which divide the sections into outer be readily set u by the user at the time the box wall forming portions or panels I5, top forming is to be employed. portions or panels l8, inner wall portions or pan- The main objects of the invention are to proels I1 and attachment or gluing flaps l8. vide means for looking a tubular walled box of The wall forming sections i2 and i4 embody the character indicated in set up condition; to slit lines and fold lines which serve to provide provide locking means for the purpose indicated foldable tongues 9, l9 at each end. of each of which will be positive in action and which will the top a l portions l6. As illustrated, the renot readily become disabled or disengaged, but Spective tongues !9 a e, in B Temflvfid from which may nevertheless be easily and quickly en-. the respective top wall portions l6 and they are caged as an incident to the setting up of the foldable about foldable connections with the refolded or collapsed bah: and to provide improved spective inner f po or p s such locking means oi simple, rugged character which cmmectionfi being S e utw d y rom the adwill not increase the size of the blank from jacent edge fold n 01' the op W por n 15 o whi h th b x i fgrmed downwardly from the top when the box is set up) The improved construction is primarily a The wall forming sections II and 13 are resigned for use in connection with the manufac spectively Provided with foldable flaps 29 at {are of paper boxes but t will be apparent that each end of the outer wall forming" portions 55, other foldable materials may be substituted. Each section H and is also Pmvided with Other objects and advantages of the invention a Pail Wngles 25, at each 3 of top will be understood by reference to the following 33 wall porno Such tongue extendleg integrally specjficatign and accompanying Kim-Wings (Wm laterally outwardly from the respective end por e h r '1 p I tions of said top wall panels.

$5 3 g g g zigg5 23135 221 The blank is initially folded to the collapsed box b d m a 5919015841 form of the invention form illustrated in Figure 2, the respective wall In the drawings: forming sections being folded about the various Figure 1 i plan of t blank from which the fold lines so as to form the sections into colimproved box is formed; lapsed tubes, the attachment flaps l8, I8 being Figure 2 is a perspective of the completely glued or otherwise secured to the marginal poriormed box in collapsed w e tions of th bottom section it By preference, the Figure 3 is a Session an the 11 f fold line 'etween each attachrnen ag: it and ure 2; p who t inner wall is formed by cut Figure 4 is a perspective of the inniteed hex SPOI y Cutting p y through @119 in. set up condition; f the stock so as to provide for a sharp Figure 5 a section on the line a? ure 4; when, the box is to be set up, the respective Figure 6 is a e *igg; waiis are pressed inwardly and upwardly, the

f the sh'wing o p n is aw being first adiusted to their set "n, ing the process of setting 'tuoiziar position illustrated in Figure Figure 7 is e, J o their up a. SDL'llfita-iie but showing the parts i r zrarms t e setting no of position, iilu E "lies W" "aided plan tain portions be ii? i section to more clearly illustlat of r i2 and tion (1 -"steod the waits are all prefabricated to Referring now to the drawings, t e improved be of the same height, it will be apparent "that box is formed from a bi. will assume the position men board no ;e-riai which it edi 3Ztiiiti$ oi'thetop panels e the construe from which they extend being incidentally defiected slightly to permit the tongues to be lowered to the extent of the thickness of the paperboard stock.

The tongues l9 are folded about their respective fold lines F to a downwardly extending position in face to face engagement with the respective inner wall portions l'l, thereby to permit the adjacent end edge Ha of the inner wall portion of the adjacent wall I l to pass transversely across the downwardly folded tongue.

When the walls II (or l3) reach their fully set up condition as illustrated in Figures 4, 5i, 8 and 9, the tongue l9 will be located within the space between the inner and outer wall portions l5 and I7 and will spring upwardly to a position against the inner surface of the top portion of the wall. As illustrated, the tongues 19 and 2! are of such width that they fit snugly within the respective walls into which they project and the innermost edges 22 of the various tongues are adapted to engage the inner surfaces of the respectively adjacent inner wall portions I1, l1, so as to thereby prevent outward or unfolding movement of the walls.

It will be observed that the foldable or bendable tongue 19 is wholly concealed within one of the tubular walls and that the inherent resiliency of the paperboard stock tends to maintain the tongue in its unfolded, laterally extended position as illustrated in Figures 5, 8 and 9. Because the tongues and 2| are located entirely within the respective wall they are protected from outward forces which might tend to fold them downwardly so as to permit unfolding of the walls and it will be apparent that unfolding of the walls can be accomplished only by a very deliberate'manipulation of the tongue l9.

Changes in the described construction may be made without departing from the invention, the scope of which should be determined by reference to the following claims, the same being construed with reference to the spirit of the invention rather than to the specific but altera'ble details of construction illustrated.

I claim:

1. A paper board box having a bottom wall and relatively transversely extending tubular side walls, said side walls being foldably connected to said bottom wall and being foldable, one in advance of the other, from collapsed condition substantially flatwise of the bottom wall to distended tubular condition in upstanding relation to said bottom wall, and means for locking one of said side walls in upstanding position comprising a tonguecarried by and normally projecting laterally inwardly from the first foldable wall, said tongue being bendable to substantially nonprojecting position relative to the wall from which it normally projects, the other of said walls having an end portion terminating in proximity to the plane of said tongue when bent to said non-projecting position and being adjustable to upstanding position by movement transversely past said tongue when folded to said non-projecting position, the inherent resiliency of the material of the box serving to cause said bendable tongue to spring to said normal position after movement of said Wall end portion therepast, whereby said tongue is caused to project beyond said wall end portion so as to obstruct movement of said last folded wall to collapsed condition.

2. A paper board box having a bottom wall nd relatively transversely extending tubular side walls, said side walls being foldably connected to said bottom wall and being foldable, one in advance of the other, from collapsed condition substantially flatwise of the bottom wall to distended tubular condition in upstanding relation to said bottom wall, means for locking one of said side walls in upstanding position comprising a tongue carried by and normally projecting laterally inwardly from the first foldable wall, said tongue being bendable to substantially non-projecting position relative to the wall from which it normally projects, the other of said walls having an end portion terminating in proximity to the plane of said tongue when bent to said non-projecting position and being adjustable to upstanding position by movement transversely past said tongue when folded to said non-projecting position, the inherent resiliency of the materialof the box serving to cause said bendable tongue to spring to said normal position after movement of said wall end portion therepast, whereby said tongue is caused to project beyond said wall end portion so as to obstruct movement of said last folded wall to collapsed condition, and means for locking the first folded wall in upstanding position.

3. .A paper board box having a bottom wall and relatively transversely extending tubular side walls, said side walls being foldably connected to said bottom wall and being foldable, one in advance of the other, from collapsed condition substantially flatwise of the bottom wall to distended tubular condition in upstanding relation to said bottom wall, means for locking one of said side walls in upstanding position comprising a tongue carried by and normally projecting laterally inwardly from the first foldable wall, said tongue being bendable to substantially non-projecting position relative to the wall from which it normally projects, the other of said walls having an end portion terminating in proximity to the plane of said tongue when bent to said non-projecting position and being adjustable to upstanding position by movement transversely past said tongue when folded to said non-projecting position, the inherent resiliency of the material of the box serving to cause said bendable tongue to spring to said normal position after movement of said wall end portion therepast, whereby said tongue is caused to project beyond said wall end portion so as to obstruct movement of said last folded wall to collapsed condition, and means carried by the last folded wall and engageable with the first folded wall for locking the latter in upstanding position.

4. A paper board box having a bottom wall and relatively transversely extending tubular side walls, said side walls being foldably connected to said bottom wall and being foldable, one in advance of the other, from collapsed condition substantially fiatwise of the bottom wall to distended tubular condition in upstanding relation tosaid bottom wall, means for locking one of said side walls in upstanding position comprising a tongue carried by and normally projecting laterally inwardly from the first foldable wall, said tongue being bendable to substantially non-projecting position relative to the wall from which it normally projects, the other of said walls having an end portion terminating in proximity to the plane of said tongue when bent to said non-projecting position and being adjustable to upstanding position by movement transversely past said tongue when folded to said non-projecting position, the inherent resiliency of the material of the box serving to cause said bendable tongue to sprin assume to said normal position after movement; oi said wall end portion therepast. whereby said tongue is caused to project beyond said wall end portion so as to obstruct movement of said last iolded wall to collapsed condition, and means for locking the first folded wall in upstanding position comprising a rigid tongue projecting from the last folded wall and insertable into the adjacent end portion of said first folded wall as an incident to the folding of the last folded wall to upstanding position.

5. A paper board box according to claim 1 wherein the bendable tongue is bendable on a fold line which extends transversely of the upwardly extending plane ofthe upstanding wall held against unfolding movement by said tongue.

6. A paper board box according to claim 1 wherein said bendable tongue is foldably connected to an upper, horizontal edge portion or the wall from which it extends, and wherein said tongue is bendable downwardly from said upper edge and into face to face relation with said wall to permit the other wall to move past said tongue to upstanding position.

7. In a collapsible paper board box, a bottom wall, relatively transversely extending tubular side walls, said side walls embodying spaced inner and outer side portions and a top Portion, said side portions being foldably connected adjacent their lower edges to said bottom wall, and said top portion being ioldabiy connected to the upper edges of said side portions, said tubular walls being ioidable Irom a collapsed position tiatwisc 01' said bottom wall to distended tubular upstand. in: position, and means for looking said tubular walls in upstanding position, comprising a tongue projecting transversely from each of said walls into the end portion of the other, said tongues projecting from the respective walls in substantially parallel relation to said bottom, and being of substantial width in said parallel plane at their respective points of connection with the walls from which they extend, said tongues being thereby effective to ofier substantial resistance to unfolding movement of the respective walls into which they project, one of said tongues extending from thetop portion of one wall and the other of said tongues being foldably connected to a portion of the other wall, and being displaceable from normal locking position to a predetermined folded position, to permit unfolding movement of one of said walls through the locking position normally occupied by the dlsplaceable tongue, the normal resiliency of the paper board serving to cause said displaceable tongue to automatically spring to its locking position in the last mentioned wall when unfolded to its normal upstanding position.

MILTON A. SMITH. 

